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4.
Web Annotation<br />Web Annotation can be used by scholars or web-users to share information about certain resources or topics.<br />Existing Annotation systems:<br />Need Client side script to create and view the annotations.<br />The Annotea<br />LEMO<br />

7.
Resources Archiving<br />What if the Resource doesn’t have a memento?!<br />We will not be able to view the annotation when the original resource move. <br />Push all related resources to the Archive .<br />In this case, we make sure that, all resources are archived and persistent.<br />

12.
Open and Independent <br />The annotation should be retrieved by the browser without the help of any extra plugin or adds-on.<br />SVG [Scalable Vector Graphs] used to represent the annotations. <br />SVG is a Text-based Markup language written in XML<br />Supported in [Firefox, IE9, Chrome ,Safari]<br />

13.
Scalable Vector Graphs [SVG]: <br />Searchable:<br />Google started indexing the SVG content on August 31st, 2010.<br />SVG file can contain Audio, Video, and image tags.<br />Image tag is supported by all browsers<br />Audio and video tags are supported by SVG readers but not browsers yet. Promises that they will be supported in future updates. <br />SVG video tags can be rendered to flash in the server side in order to overcome the lack of support.<br />Supports Scripting (JavaScript).<br />

19.
The annotation service sends back a short URI for the annotation tat can be shared by users.</li></li></ul><li>Annotation service sends back the<br />bit.ly URI for the annotation.<br />http://bit.ly/i2AfwN/<br /><ul><li>User can share the bit.ly URI in his blog.

20.
Can view the annotation in any browser</li></ul>By dereferencing the bit.ly URI.<br />

21.
On The Server …<br />Different types of resources or URIs are associated with every annotation. <br /><ul><li>The target resource [URI-T] [may contain more than one target]

35.
Conclusion <br />Web Archives helped in solving the issue of keeping the annotation persistent over time, and the use of the SVG technology helped in keeping the annotation readable in any browser without any need to install extra plugins.<br />